Display screen with a graphical user interface



The FIGURE is a front view of a display screen with a graphical user interface, showing the new design.

The outermost broken line showing an electronic device illustrates environmental subject matter, whereas the remaining broken lines showing a display screen and elements of the graphical user interface illustrate portions of the article. None of the broken lines form part of the claimed design. 

CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. 